Canberras (WB-57s) to track Discovery launch
 

To achieve longer visual on Discovery for STS-114. two WB-57s (NASA 926/928) are to deploy at 60,000ft to observe until main engine cutoff. They are also rumoured/proposed as a way around the day launch requirement.

http://forums.military.com/eve/ubb.x...1/m/3541970286
NYT rego required:
http://www.nytimes.com/2005/07/12/sc...rssnyt&emc=rss
and more here:
http://filmer.********.com/2005_04_0...39283092340814
Still no plan to replace them eh?